Axial-flow air blower fan blades

ABSTRACT

An axial-flow air blower&#39;s fan blades may include a blade portion, and a guide blade portion provided behind the blade portion. The guide blade portion has five guide blades, and the blade portion has a hub and a plurality of blades provided on the hub. The blades and the hub are integrated. There are twelve blades, and an outer circumference defined by the outer edges of the twelve blades has a diameter of 84 mm. The structure is simple and reasonable. The integration of the blades and hub improves concentricity and strength of the blades, increases air volume, and reduces noise. A reasonable number of blades and fan diameter together with a reasonable number of guide blades can improve efficiency and wind speed.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a Continuation Application of PCT application No. PCT/CN2015/084526 filed on Jul. 20, 2015, which claims the benefit of Chinese Utility Model Application No. 201420616868.X filed on Oct. 24, 2014. All the above are hereby incorporated by reference.

FIELD OF THE TECHNOLOGY

The present application relates to the field of air blower technology, and in particular relates to an axial-flow air blower's fan blades.

BACKGROUND

In existing market, blades and blade hub of an axial-flow air blower are of separate type, and need to be assembled by workers. The disadvantages are poor concentricity, low wind speed, low strength, and loud noise. In the market, the diameter of the fan, the number of blades, and the number of guide blades do not reach a reasonable ratio. The shortcomings are that wind speed is low, machine's current is high, fan vibration is vigorous, and the gap between the fan blades and the fan housing is large. This does not facilitate input air volume, and results in small output air volume and loud noise.

SUMMARY

The technical problem to be solved is to provide an axial-flow air blower with fan blades having simple and reasonable structure. The blades and the hub are integrated. This advantageously improves the concentricity and strength of the blades, increases air volume, and reduces noise. A reasonable number of blades and fan diameter together with a reasonable number of guide blades can improve efficiency and wind speed.

To solve the above-mentioned technical problem, the technical solution is to provide an axial-flow air blower's fan blades which may include a blade portion, and a guide blade portion provided behind the blade portion, the guide blade portion having five guide blades, the blade portion having a hub and a plurality of blades provided on the hub, the blades and the hub being integrated, wherein there are twelve blades, and an outer circumference defined by outer edges of the twelve blades has a diameter of 84 mm.

In a preferred embodiment, the hub has a diameter of 40 mm.

In a preferred embodiment, the guide blade portion may further include a central cylinder, one end of each guide blade being fixed to the center cylinder and another end being fixed to an inner wall of an outer cylinder of the axial-flow air blower.

The beneficial effect of the axial-flow air blower fan blades of the present application is that it has a simple and reasonable structure. The blades and the hub are integrated so as to facilitate improvement of concentricity and strength of the blades, increase air volume, and reduce noise. A reasonable number of blades and fan diameter together with a reasonable number of guide blades can improve efficiency and wind speed.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution provided by the embodiments of the axial-flow air blower's fan blades of the present application, the drawings to be used in the description of the embodiments will be briefly described below. It will be apparent that the drawings mentioned in the following description are merely some implementations of the axial--flow air blower's fan blades. Without making any creative effort, a person skilled in the art may derive other drawings from the drawings in the present application, wherein:

FIG. 1 is a schematic view of the structure of a blade portion;

FIG. 2 is a schematic view of the structure of a guide blade portion;

FIG. 3 is a schematic view of the structure of a blade;

FIG. 4 is a cross--sectional view of the blade taken along line E-E of FIG. 3; and

FIG. 5 is a cross-sectional view of the blade taken along line H--H of FIG. 3.

The reference numerals in the drawings and their designating parts are as follows: 1-guide blades, 2-hub, 3-blades.

DETAILED DESCRIPTION

The technical solution provided by the embodiments of the axial-flow air blower fan blades of the present application will be described clearly and completely below. It is apparent that the described embodiments are only some embodiments of the axial-flow air blower's fan blades, and not all of the embodiments. All other embodiments obtained by an ordinary technical person skilled in the art, without making any creative effort, are within the scope of protection of the axial-flow air blower fan blades of the present application.

Referring to FIGS. 1 to 5, an embodiment of the axial-flow air blower fan blades of the present application may include a blade portion, and a guide blade portion provided behind the blade portion. The guide blade portion may include five guide blades 1. The blade portion may include a hub 2 and a plurality of blades 3 provided on the hub 2. The blades 3 and the hub 2 can be integrated. This can advantageously improve the concentricity and strength of the blades, increase air flow, and reduce noise.

The number of the blades 3 can be twelve. An outer circumference defined by the outer edges of the twelve blades 3 may have a diameter of 84 mm. With the combination of the five guide blades 1, the efficiency and wind speed of the fan blades can be improved. Otherwise, under the circumstances that the gap between the fan blades and fan housing is small and the motor is not fixed steadily, it will lead to friction between the fan blades and the fan housing. At the same time, the requirement of parallelism of the matching faces of the motor and the fan blades is higher.

The following table shows the data of performance for different blade nu gibers and different guide blade numbers:

Rate of Flow Shaft Outlet Total Fan Model (Kg/S) Power (W) Pressure (Pa) Efficiency 11 fan blades + 0.1792 317.81 1195.661 55.04% 7 guide blades 12 fan blades + 0.2064 458.55 1586.598 58.36% 5 guide blades

Preferably, the diameter of the hub 2 is 40 mm.

The guide blade portion may further include a central cylinder. One end of each guide blade may be fixed to the center cylinder and another end may be fixed to an inner wall of an outer cylinder of the axial-flow air blower.

The beneficial effect of the axial-flow air blower fan blade of the present application is that it has a simple and reasonable structure. The integration of the blades and the hub advantageously improves the concentricity and strength of the blades, increases air volume, and reduces noise. A reasonable number of blades and fan diameter together with a reasonable number of guide blades can improve efficiency and wind speed.

The above-mentioned embodiments are merely some embodiments of the axial-flow air blower's fan blades of the present application, and the scope of patent protection is not limited to these embodiments. Any equivalent structures or equivalent changes of process using the contents of the present patent specification, or any direct/indirect application in other related field of technology are within the scope of patent protection of the present application. 

What is claimed is:
 1. An axial-flow air blower's fan blades, comprising a blade portion, and a guide blade portion provided behind the blade portion, the guide blade portion comprising five guide blades, the blade portion comprising a hub and a plurality of blades provided on the hub, the blades and the hub being integrated, wherein there are twelve blades, and an outer circumference defined by outer edges of the twelve blades has a diameter of 84 mm.
 2. The axial-flow air blower's fan blades according to claim 1, wherein the hub has a diameter of 40 mm.
 3. The axial-flow air blower's fan blades according to claim 1, wherein the guide blade portion further comprises a central cylinder, one end of each guide blade being fixed to the center cylinder and another end being fixed to an inner wall of an outer cylinder of the axial-flow air blower. 